Experimental continuous-variable cloning of partial quantum information

Metin Sabuncu, Gerd Leuchs, Ulrik Lund Andersen

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Abstract

The fidelity of a quantum transformation is strongly linked with the prior partial information of the state to be transformed. We illustrate this interesting point by proposing and demonstrating the superior cloning of coherent states with prior partial information. More specifically, we propose two simple transformations that under the Gaussian assumption optimally clone symmetric Gaussian distributions of coherent states as well as coherent states with known phases. Furthermore, we implement for the first time near-optimal state-dependent cloning schemes relying on simple linear optics and feedforward.
Original languageEnglish
JournalPhysical Review A
Volume78
Issue number5
Pages (from-to)052312
ISSN2469-9926
DOIs
Publication statusPublished - 2008

Bibliographical note

Copyright 2008 American Physical Society

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